XII Jewellers is a London-based luxury jewellery house specialising in sourcing and curating exceptional fine pieces. Operating from a private viewing space at One Canada Square in Canary Wharf, they welcome clients by appointment only. Every piece in their collection is verified and carefully sourced through trusted specialists who authenticate provenance, craftsmanship and quality. Their offering includes vintage Alhambra and Messika collections, solid gold pieces, and luxury watches selected for their enduring style. XII Jewellers also provides a bespoke service for made-to-order diamond rings handcrafted in London, where clients choose centre stone, carat weight, metal and setting to bring their vision to life.